![]() ![]() The LEDs only go off when you turn the device off. You can choose from 24 different levels of brightness, and even at the lowest, the lights are still on. ![]() Lights usually prove to be a power drain, but battery life has been preserved by using low-power LEDs and engineering the device to use them efficiently. The imprinted guide pattern changes as it travels away from the light source in a way that ensures near-uniform distribution despite the fact that it's all coming from the bottom of the screen. It's imprinted with what they refer to as "nanoscale optical diffractive patterns" that direct the light across the screen and cause it to come out in certain areas, distributing it as evenly as possible downward onto the display. This top layer has been described by Amazon as being akin to a fiber optic cable flattened out into a sheet. These tiny lights point toward the display, and the light guide layer disperses the light across the entire screen. There are four tiny LEDs built into the bezel at the bottom of the device's screen. And the light guide is something new altogether. ![]() The multi-touch screen is a step up from the Kindle Touch's infrared (IR) touch screen. The display layer is similar to previous Kindle displays, but with improved resolution and contrast. The display is made up of three layers: the E Ink display (innermost), the capacitive touch screen (middle) and the light guide (outermost) layers. The most innovative thing about the Kindle Paperwhite is the front-lit screen with what Amazon is calling "light guide" technology. ![]()
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